In my wallet I have six notes in total, four are $50 notes and the rest are $20 notes. Write the ratio of $50 notes to $20 notes. Simplify the above ratio.

Evaluate the following expression 1/3^2

Can someone me and plz do the problem

Adolphin is swimming with her friend. the dolphin jumps to a height of 4.54.54, point, 5 meters above the surface of the water as her friend swims 9.89.89, point, 8 meters directly below her. what is the position of the dolphin's friend relative to the surface of the water? meters